Keithley 2600a series User Manual

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 8-3
Series 2600A System SourceMeter® Instruments Reference Manual Section 8: Digital I/O
Output enable and interlock line
The Model 2601A/2602A output enable (OE) line and the Model 2611A/2612A/2635A/2636A
interlock (INT) line of the digital I/O can be used with a switch in the test fixture or component
handler. With proper use, power is removed from the DUT when the lid of the fixture is opened.
See
Output enable (Models 2601A/2602A) or Interlock (Models 2612A/2612A/2635A/2636A) for
more details.
WARNING The digital I/O port of the Model 2601A/2602A is not suitable for
control of safety circuits and should not be used to control a safety
interlock. When an interlock is required for safety, a separate
circuit should be provided that meets the requirements of the
application to reliably protect the operator from exposed voltages.
Model 2611A/2612A/2635A/2636A digital I/O ports include an
interlock line that may be used as safety interlock.
Digital I/O configuration
Figure 8-2 shows the basic configuration of the digital I/O port. Writing a 1 to a line sets that line
high (~ +5V). Writing a 0 to a line sets that line low (~0V). Note that an external device pulls an I/O
line low by shorting it to ground, so that a device must be able to sink at least 480μA per I/O line.
Figure 8-2
Digital I/O port configuration
DIGITAL I/O INTERFACE (All Series 2600A Models):
Connector: 25-pin female D
Input/Output pins: 14 open-drain I/O bits
Absolute maximum input voltage: 5.25V
Absolute minimum input voltage: -0.25V
Maximum logic low input voltage: 0.7V @ +850mA
Minimum logic high input voltage: 2.1V @ +570mA
Maximum source current (flowing out of digital I/O bit): +960mA
Absolute Maximum sink current (flowing into digital I/O bit): -11.0A
Maximum Sink Current @ Maximum Logic Low Voltage (0.7V): -5.0mA.
Read by firmware
5.1kW
Rear panel
100W
Written by firmware
+5VD
600mA solid state
fuse
DIGITAL I/O pin
(on DIGITAL I/O connector)
GND pin
(on DIGITAL I/O connector)
+5V pin
(on DIGITAL I/O connector)

Keithley 2600a series Specifications

General

Brand	Keithley
Model	2600a series
Category	Measuring Instruments
Language	English